Elastic-plastic and residual stresses in symmetric thermoplastic laminated plates under a linear thermal loading

Sayman O.

COMPOSITES SCIENCE AND TECHNOLOGY, vol.62, no.9, pp.1231-1238, 2002 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 62 Issue: 9
  • Publication Date: 2002
  • Doi Number: 10.1016/s0266-3538(02)00061-1
  • Journal Name: COMPOSITES SCIENCE AND TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1231-1238
  • Keywords: plastic deformation, laminates, residual stress, thermoplastic, BEHAVIOR
  • Dokuz Eylül University Affiliated: No

Abstract

Thermal stresses are of great importance in composite structures. In this study, a thermal elastic-plastic stress analysis is carried out in (0degrees/90degrees)(2), (30degrees/-30degrees)(2), (45degrees/-45degrees)(2), (60degrees/-60degrees)(2) symmetric thermoplastic laminated plates. Temperature changes linearly along the cross sections of the plates. It is zero and T-0 at the upper and lower surfaces, respectively. The distribution of the residual stress components of sigma(x) and sigma(y) are illustrated along the cross sections of the laminated plates for different thermal loading. Elastic-plastic and residual stress components are given in the tables. The strength of the laminated plates may be increased by using residual stress. Tsai-Hill Criterion is used as a yield criterion. Differential equations are solved numerically with a sufficiently large number of integration intervals of the temperature. The composite material is assumed to be linear strain hardening. (C) 2002 Published by Elsevier Science Ltd.